Structured catalysts via multiple stage thermal oxidation synthesis of FeCrAl alloy sintered microfibers
Structured catalysts via multiple stage thermal oxidation synthesis of FeCrAl alloy sintered microfibers
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DOI：
10.1016/j.cej.2011.01.058
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发表时间：
2011-03-15
影响因子：
15.1
通讯作者：
Semagina, Natalia V.
中科院分区：
文献类型：
--
作者：
Samad, Jadid E.;Nychka, John A.;Semagina, Natalia V.
基于FeCrAl合金烧结微纤维（SMF）通过在空气中在930 ℃下多阶段热氧化1小时、在960 ℃下1小时和在990 ℃下2小时来开发结构化催化剂载体。该过程导致形成主要为α-氧化铝晶须的森林（高度为200 nm，间距为100 nm）。钯沉积和还原产生0.5重量%的具有20 nm纳米颗粒尺寸的Pd/SMF。该催化剂在2-甲基-3-丁烯-2-醇的三相氢化中进行了测试，并且由于其孔结构允许消除内部传质限制。开发的载体可以是有益的催化反应遭受的传质限制和催化剂失活，通过孔径堵塞。与结构化催化剂制备的其它方法相比，热氧化过程简单、快速且环境友好，并且消除了与粉末催化剂或载体的传统修补基面涂层的差粘附性相关的问题。(C)2011 Elsevier B. V.保留所有权利。
A structured catalyst support was developed based on FeCrAl alloy sintered microfibers (SMF) via multiple stage thermal oxidation in air for 1 h at 930 degrees C, 1 h at 960 degrees C and 2 h at 990 degrees C. The procedure resulted in the formation of a forest of predominantly a-alumina whiskers (200 nm in height and 100 nm apart). Palladium deposition and reduction yielded 0.5 wt.% Pd/SMF with 20 nm nanoparticle size. The catalyst was tested in three-phase hydrogenation of 2-methyl-3-buten-2-ol, and due to its pore structure allowed eliminating internal mass transfer limitations. The developed support can be beneficial to catalytic reactions suffering from mass transfer limitations and catalyst deactivation via pore mouth blocking. As compared to other methods of structured catalyst preparation, the thermal oxidation procedure is simple, fast and environmentally benign, and eliminates problems associated with poor adhesion of traditional washcoated layers of powdered catalysts or supports. (C) 2011 Elsevier B.V. All rights reserved.